I've been working on creating a centralized calendar system for my GroupWise system by using published calendars and think that I might have found a bug but am not sure. If I create an all day event on December 31 for New Year's Eve, it shows up in the GroupWise user's calendar correctly for the person publishing the calendar, but when I go to the iCal calendar page for January of the next year, 2012 in this case, every day for the month of January I'm seeing an all day event for New Year's Eve.

If I change the event from an all day event to midnight to 11:59PM the events for January of the following year go away. Has anyone else seen this behavior with all day events on December 31 for published calendars?